Embriologic Derivatives

Surface Ectoderm

Anterior pituitary (Rathke pouch)

Neural Tube

Brain & spinal cord

Neural Crest

Neural ganglia, adrenal medulla

Mesoderm

Muscles (skeletal, cardiac & smooth)

Endoderm

Gastrointestinal tract, liver, pancreas

Surface Ectoderm

Lens & cornea

Surface Ectoderm

Inner ear sensory organs, olfactory epithelium

Surface Ectoderm

Nasal & oral epithelial linings, salivary glands

Surface Ectoderm

Epidermis, sweat & mammary glands

Neural Tube

Posterior pituitary, pineal gland

Neural Tube

Retina

Neural Crest

Schwann cells; pia & arachnoid mater

Neural Crest

Aorticopulmonary septum & endocardial cushions

Neural Crest

Branchial arches (bones & cartilage)

Neural Crest

Skull bones

Neural Crest

Melanocytes

Mesoderm

Connective tissue, bone & cartilage

Mesoderm

Serosal linings (eg, peritoneum)

Mesoderm

Cardiovascular & lymphatic system

Mesoderm

Spleen & hemopoietic cells

Mesoderm

Kidney & ureters, internal genitalia

Mesoderm

Adrenal cortex

Endoderm

Lungs

Endoderm

Thymus, parathyroids, thyroid follicular cells

Endoderm

Middle ear epithelium

Endoderm

Bladder & urethra

Endoderm

Parafollicular (C) cells